Facebook chat not working

I have a blackberry 9360 but the chat of facebook doesn't connect with my account. If i connect with my sister account for example, it does work. sometimes it talks about 501 error, but i've tried to reboot the bb, erase the cache and even reinstall the app several times and it keeps not working. Sometimes it says that i'm already connected but then there is no one connected. i've checked on the facebook.com site from the pc but there appear a lot of people online so i don't understand what happens to my chat on bb. what should i do?

Re: Facebook chat not working

my facebook app does not allow me to chat with online friends. It says its online but no friends load that are online. It just says conversations 0 and online contacts 0 when i go on the pc I have a lot of contacts online. If someone else puts their facebook account on my phone it loads there online friends but isnt loading mines!!!